/**
 * This file is part of 1genia trampoline
 * Copyright (C) 2007-2008 1genia (contact@1genia.com)
 *
 * This library is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; version 3 of the License. 
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details. 
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; see the file COPYING.TXT.  If not,
 * write to the Free Software Foundation, Inc., 51 Franklin Street,
 * Fifth Floor, Boston, MA 02110-1301, USA. 
 **/
package com.genia.toolbox.spring.initializer;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;

import com.genia.toolbox.basics.exception.BundledException;

/**
 * A static class to keep {@link ApplicationContext} created by trampoline.
 */
public class ApplicationContextHolder
{

  /**
   * the <code>Log</code> variabe.
   */
  private static final Logger LOGGER = LoggerFactory.getLogger(ApplicationContextHolder.class);

  /**
   * returns the current application context.
   */
  private static ApplicationContext currentApplicationContext = null;



  /**
   * returns the current {@link ApplicationContext} generated by trampoline.
   * 
   * @return the current {@link ApplicationContext} generated by trampoline
   * @throws BundledException
   *           when an error occured
   */
  public static ApplicationContext getApplicationContext()
      throws BundledException
  {
    if (currentApplicationContext == null) {
      return ProcessInitializer.getApplicationContext();
    }
    return currentApplicationContext;
  }



  /**
   * set the current {@link ApplicationContext} generated by trampoline.
   * 
   * @param applicationContext
   *          the current {@link ApplicationContext} generated by trampoline
   */
  public static void setApplicationContext(ApplicationContext applicationContext)
  {
    if (applicationContext != null && currentApplicationContext != null) {
      LOGGER.warn("Setting a new ApplicationContext while the former has not been released.");
    }
    currentApplicationContext = applicationContext;
  }
}
